Hi, I would like to make a homemade electromagnetic device. It would be a 5cm diameter metal cylinder inside of a metal pipe. I would use electromagnetism to lift the (heavy) steel cylinder up the pipe, and then release it. It's meant to be used as a sledge hammer. Can I just wind a wire around the pipe? How much power do you think this will need? The cylinder weighs about 10kg and is 2ft long.